1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public 17 * License along with this program; if not, write to the 18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 19 * Boston, MA 021110-1307, USA. 20 */ 21 22 #ifndef OCFS2_AOPS_H 23 #define OCFS2_AOPS_H 24 25 #include <linux/fs.h> 26 27 handle_t *ocfs2_start_walk_page_trans(struct inode *inode, 28 struct page *page, 29 unsigned from, 30 unsigned to); 31 32 int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno, 33 struct inode *inode, unsigned int from, 34 unsigned int to, int new); 35 36 void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages); 37 38 int walk_page_buffers( handle_t *handle, 39 struct buffer_head *head, 40 unsigned from, 41 unsigned to, 42 int *partial, 43 int (*fn)( handle_t *handle, 44 struct buffer_head *bh)); 45 46 int ocfs2_write_end_nolock(struct address_space *mapping, 47 loff_t pos, unsigned len, unsigned copied, void *fsdata); 48 49 typedef enum { 50 OCFS2_WRITE_BUFFER = 0, 51 OCFS2_WRITE_DIRECT, 52 OCFS2_WRITE_MMAP, 53 } ocfs2_write_type_t; 54 55 int ocfs2_write_begin_nolock(struct address_space *mapping, 56 loff_t pos, unsigned len, ocfs2_write_type_t type, 57 struct page **pagep, void **fsdata, 58 struct buffer_head *di_bh, struct page *mmap_page); 59 60 int ocfs2_read_inline_data(struct inode *inode, struct page *page, 61 struct buffer_head *di_bh); 62 int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size); 63 64 int ocfs2_get_block(struct inode *inode, sector_t iblock, 65 struct buffer_head *bh_result, int create); 66 /* all ocfs2_dio_end_io()'s fault */ 67 #define ocfs2_iocb_is_rw_locked(iocb) \ 68 test_bit(0, (unsigned long *)&iocb->private) 69 static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level) 70 { 71 set_bit(0, (unsigned long *)&iocb->private); 72 if (level) 73 set_bit(1, (unsigned long *)&iocb->private); 74 else 75 clear_bit(1, (unsigned long *)&iocb->private); 76 } 77 78 /* 79 * Using a named enum representing lock types in terms of #N bit stored in 80 * iocb->private, which is going to be used for communication between 81 * ocfs2_dio_end_io() and ocfs2_file_write/read_iter(). 82 */ 83 enum ocfs2_iocb_lock_bits { 84 OCFS2_IOCB_RW_LOCK = 0, 85 OCFS2_IOCB_RW_LOCK_LEVEL, 86 OCFS2_IOCB_NUM_LOCKS 87 }; 88 89 #define ocfs2_iocb_clear_rw_locked(iocb) \ 90 clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private) 91 #define ocfs2_iocb_rw_locked_level(iocb) \ 92 test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private) 93 94 #endif /* OCFS2_FILE_H */ 95